======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '1054'
                                          'artist'  'Ludwig Van Beethoven'
                                     'text_people'  ''
                                         'release'  '9 Symphonies - Herbert Von Kar'
                                           'title'  'Symphony No 9 in D minor op 12'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'composers', 'romantic', 'classical', 'classic']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '145.476'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     '9 Symphonies - Herbert Von Kar'
'TBPM' (BPM (beats per minute))                     '145.476'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Symphony No 9 in D minor op 12'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ludwig Van Beethoven'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'romantic', 'classical', 'classic']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.05 dB'
'TXXX:replaygain_track_peak'                        '0.655534'

========================== row from database ==========================
                                              'id'  190202
                                            'path'  /data/Music/Bulk/00instruments-classical/Unsorted/Ludwig Van Beethoven__Ludwig Van Beethoven Sinfonien 1-9__cifs7a83.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  1054
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  25323004
                                           'mtime'  1620561859
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Unsorted Beethoven__Ludwig Sinfonien 9__cifs7a83 prerock classical classical instruments
                                      'tag_artist'  Ludwig Van Beethoven
                                     'tag_release'  9 Symphonies - Herbert Von Kar
                                       'tag_title'  Symphony No 9 in D minor op 12
                                             'bpm'  145.476
                                    'search_title'  '9':3 'd':5 'in':4 'minor':6 'no':2 'op':7 'symphony':1
                                   'search_artist'  'beethoven':3 'ludwig':1 'van':2
                                  'search_release'  '9':1 'herbert':3 'kar':5 'symphonies':2 'von':4
                                     'search_rest'  '00instruments':1 '9':7 'beethoven':4 'cifs7a83':8 'classical':2 'instruments':10 'ludwig':5 'prerock':9 'sinfonien':6 'unsorted':3
                                    'search_combo'  '00instruments':16 '9':3A,11C,22 'beethoven':10B,19 'cifs7a83':23 'classical':17 'd':5A 'herbert':13C 'in':4A 'instruments':25 'kar':15C 'ludwig':8B,20 'minor':6A 'no':2A 'op':7A 'prerock':24 'sinfonien':21 'symphonies':12C 'symphony':1A 'unsorted':18 'van':9B 'von':14C
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'romantic', 'classical', 'classic']
                                        'tag_date'  
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620561859.3522203  (2021-05-09 14:04:19)
                             'size'  25323004